# FX_CosFx64c

## C Specification

      #include <nitro/fx/fx_trig.h>

      fx64c FX_CosFx64c( fx32    rad );

## Description

This function receives radians as an `fx32` type and returns the result as `fx64c`. Accuracy is to at least 7 decimal places and usually to 8 decimal places. Approximations are made using internal progressive calculations. Use this function when the accuracy with `FX_CosIdx` will be insufficient.

## Arguments

`rad` | Radians in `fx32` format fixed-point decimal

## Return Values

Approximation of the cosine.

## See Also

`FX_SinIdx, FX_CosIdx, FX_SinFx64c`

## Revision History

01/19/2004 Initial Version